Infinite Money Trick
Use this method to get all the infinite-ammo weapons and infinite weapons pack. In the mercinary mode go to the area with the dumpster and the hop skotch paintings (the one right behind the bar.) Go up the steps and take a right. You will then go north until you get to the fork. Go through the door and you will be in the deadend alley that is boarded up by red and white boards. This can be done with all 3 mecinaries. There are three dogs here. First kill 2 dogs immediately. Then lure the remaining dog to where the boards are stacked up. Climb up onto the boards. Go to the opposite end and watch as the dog makes attempts to jump at you. Take a small step forward and press R1 right before he jumps. Your character will jump backwards and get a dodge bonus. Immediately after the character dodges, press R1 again to pick up a combo for your dodge bonus. Repeat this process to rack up tons of money and time. It takes time, but it is sure worth it.